Raimon Zamora
ab77116dca
- [NEW] Afegit tagging de memòria - [NEW] modul mbc_none funcional - [NEW] Afegit modul main base del programa - [NEW] Afegits Makefile i .gitignore - Primera execució. No arriba a 0x0100 - [FIX] Corregida la representació del ensamblador cap enrere
98 lines
2.6 KiB
C++
98 lines
2.6 KiB
C++
#include "mbc_none.h"
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#include "mem.h"
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#include <stdlib.h>
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namespace mbc_none
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{
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uint8_t bootrom[256];
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uint8_t *rom;
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uint8_t vram[8192];
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uint8_t exram[8192];
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uint8_t wram[8192];
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uint8_t hram[512];
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uint8_t tags[65536];
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uint8_t readMem(uint16_t address)
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{
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if (address < 0x8000) {
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if ( (address < 0x0100) && ((hram[0x150]&0x01)==0) ) return bootrom[address];
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return rom[address];
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} else if (address < 0xA000) {
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return vram[address - 0x8000];
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} else if (address < 0xC000) {
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return exram[address - 0xA000];
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} else if (address < 0xE000) {
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return wram[address - 0xC000];
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} else if (address < 0xFE00) {
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return wram[address - 0xE000];
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} else {
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return hram[address - 0XFE00];
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}
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}
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void writeMem(uint16_t address, uint8_t value)
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{
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if (address < 0x8000) {
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// Read Only Memory, you know...
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//rom[address] = value;
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} else if (address < 0xA000) {
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vram[address - 0x8000] = value;
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} else if (address < 0xC000) {
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exram[address - 0xA000] = value;
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} else if (address < 0xE000) {
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wram[address - 0xC000] = value;
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} else if (address < 0xFE00) {
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wram[address - 0xE000] = value;
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} else {
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if ( (address==0xFF50) && ((value&0x01) != 1) ) return; //Only allow disabling boot room
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hram[address - 0xFE00] = value;
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}
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}
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uint8_t getTag(uint16_t address)
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{
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return tags[address];
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}
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void setTag(uint16_t address, uint8_t value)
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{
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tags[address] = value;
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}
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void saveState(FILE* f)
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{
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}
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void loadState(FILE *f)
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{
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}
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void init(uint8_t *rom, uint32_t rom_size, uint32_t ram_size)
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{
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mem::readMem = mbc_none::readMem;
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mem::writeMem = mbc_none::writeMem;
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mem::getTag = mbc_none::getTag;
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mem::setTag = mbc_none::setTag;
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mem::saveState = mbc_none::saveState;
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mem::loadState = mbc_none::loadState;
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mbc_none::rom = rom;
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FILE *f = fopen("dmg_boot.bin", "rb");
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if (!f) { printf("ABORTING: 'dmg_boot.bin' not found!\n"); exit(1); }
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fseek(f, 0, SEEK_END);
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const int size = ftell(f);
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fseek(f, 0, SEEK_SET);
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fread(bootrom, size, 1, f);
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fclose(f);
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for (int i=0; i<8192; ++i) { vram[i] = 0; }
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for (int i=0; i<8192; ++i) { exram[i] = 0; }
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for (int i=0; i<8192; ++i) { wram[i] = 0; }
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for (int i=0; i<512; ++i) { hram[i] = 0; }
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for (int i=0; i<65536; ++i) { tags[i] = MEMTAG_NONE; }
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}
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} |